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What Length header bolts? SLP's

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Old Jan 10, 2004 | 05:16 PM
  #1  
Wishmaster's87IROC's Avatar
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From: Winston salem, NC
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
What Length header bolts? SLP's

What length header bolts is eveyone using with SLP headers? I know on the bolts with the offset I have to use the stock bolts but what about the others? I bought some 1" bolts and them seem to short with the gaskets. I did a search but cant find anything....heres a picture of the 1" bolts going thru the flange and the gasket, doesnt look like enough to thread, or is it just me?
Attached Thumbnails What Length header bolts? SLP's-dsc00515.jpg  
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Old Jan 11, 2004 | 12:33 AM
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MdFormula350's Avatar
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i am using the one that came with the install kit.

Bolts, Header 3/8" - 16 by 1"

http://www.slponline.com/view_produc...RTNUMBER=30034

and using the rest of the stock stud type bolts.
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Old Jan 11, 2004 | 09:36 AM
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Wishmaster's87IROC's Avatar
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From: Winston salem, NC
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
so the 1" bolts were plenty long enough? from what I measured only about 3/8th would be going into the head, is that plenty to use?

The bolts that your using are the exact same bolts I got. The 12 point bolts....so you had to have had the same amount going into the block, huh? and that was enough to get a good grab and torque them down?

Last edited by Wishmaster's87IROC; Jan 11, 2004 at 09:58 AM.
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Old Jan 11, 2004 | 09:49 AM
  #4  
Wishmaster's87IROC's Avatar
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From: Winston salem, NC
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
heres a pic:

I may go back and get 1" 1/4 cause I was going to put a lock washer on the bolts too.
Attached Thumbnails What Length header bolts? SLP's-dsc00526.jpg  

Last edited by Wishmaster's87IROC; Jan 11, 2004 at 09:57 AM.
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Old Jan 11, 2004 | 01:26 PM
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MdFormula350's Avatar
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i guess they were enough, i mean nothing stripped on my heads, and the headers went down tight. i dont have any leaks that i can tell.
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